<template>
  <form action="/">
    <van-search
        v-model="searchText"
        show-action
        placeholder="请输入搜索关键词"
        @search="onSearch"
        @cancel="onCancel"
    />
  </form>
  <van-divider content-position="left">已选标签</van-divider>
  <div v-if="activeIds.length === 0">请选择标签</div>
  <van-row gutter="16" style="padding: 0 16px">
    <van-col v-for="tag in activeIds">
      <van-tag closeable size="medium" type="primary" @close="doClose(tag)">
        {{ tag }}
      </van-tag>
    </van-col>
  </van-row>

  <van-divider content-position="right">选择标签</van-divider>

  <van-tree-select
      v-model:active-id="activeIds"
      v-model:main-active-index="activeIndex"
      :items="tagList"
  />

  <div style="padding: 16px">
    <van-button type="primary" block @click="doSearchResult">搜索</van-button>
  </div>
</template>
<script setup lang="ts">
import {ref} from "vue";
import {useRouter} from "vue-router";

const searchText = ref('')

const doClose = (tag: any) => {
  activeIds.value = activeIds.value.filter(
      item => item !== tag
  )
};
const router = useRouter()
const doSearchResult = () => {
  router.push({
    path: 'user/list',
    query: {
      tags: activeIds.value,
    }
  })
}


// 已选中的标签
const activeIds = ref([]);
const activeIndex = ref(0);
const originTagList = [
  {
    text: '性别',
    children: [
      {text: '男', id: '男'},
      {text: '女', id: '女'},
    ],
  },
  {
    text: '年级',
    children: [
      {text: '大一', id: '大一'},
      {text: '大二', id: '大二'},
      {text: '大三', id: '大三'},
      {text: '大四', id: '大四'},
      {text: 'Java', id: 'Java'},
    ],
  },
];
let tagList = ref(originTagList);

const onSearch = () => {
  tagList.value = originTagList.map(parentTag => {
    const tempChildren = [...parentTag.children]
    const tempParentTag = {...parentTag}
    tempParentTag.children = tempChildren.filter(
        item => item.text.includes(searchText.value)
    )
    return tempParentTag
  })
}
const onCancel = () => {
  searchText.value = ''
  tagList.value = originTagList
}

</script>


<style scoped>

</style>
